Optocouplers / Photocouplers

Optocouplers are a type of isolator that use a low-power optical signal to transmit one signal from one circuit to another independent circuit. Optocouplers are comprised of an infrared LED light source and an integrated photo detector which usually consists of a photodiode and detector circuit. This optical link or coupling provides electrical isolation between the two circuits which makes the trouble shooting and reliability of circuits more straightforward. These devices are often used to provide electrical isolation between digital signals on the same board, but they are also commonly used in medical and industrial instruments, motor control systems, and signal conditioning circuits. Optocouplers have very high input-to-output isolation voltage and low capacitance, which makes them suitable for signal transmission in high speed applications. Additionally, they manage the call back current of the circuit they are connecting, allowing them to protect against overloads.
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HCPL2531M


Fairchild Semiconductor High Speed Optocouplers
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ON Semiconductor 3312
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AUD 1.437
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VOM617A-8T


Transistor Output Optocouplers Phototransistor Out CTR 130-260% 5mA
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Vishay 3305
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AUD 0.2113
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HCPL0638


High Speed Optocouplers 100B Logic Dual Ch Hi Perform Optocuplr
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ON Semiconductor 3298
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AUD 2.7762
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Hot MOC3162M


Triac & SCR Output Optocouplers DIP-6 ZERO TRIAC
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ON Semiconductor 3298
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AUD 0.6496
Multiples of: 1

IS281-4


Optoisolator Transistor Output 3750Vrms 4 Channel
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Isocom 3290
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AUD 1.5333
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MOCD208R2M


Transistor Output Optocouplers 8-Pin Optocoupler 2Ch Phototransistor
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ON Semiconductor 3289
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AUD 0.4802
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VOM617A-4X001T


Vishay Semiconductors Transistor Output Optocouplers Phototransistor Out CTR 160-320% 5mA VDE
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Vishay 3282
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AUD 0.22
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VOH1016AB-VT


High Speed Optocouplers 1MBps Schmitt-Trigr SMD-6; VDE
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Vishay 3273
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AUD 0.6356
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TCLT1105


Transistor Output Optocouplers Phototransistor Out Single CTR 50-150%
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Vishay 3270
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AUD 0.3614
Multiples of: 1

4N25V


Transistor Output Optocouplers Phototransistor Out Single CTR >20%
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Vishay 3261
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AUD 0.3498
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